onnxruntime

C API version 0.001 (#11758)

* C API version 0.001

* fix linker issues

* fixes for save checkpoint api

* plus fixes based on tests

* plus test_runner and other changes

* Plus cosmetic updates

* remove unnecessary headers

* plus some updates

* plus more changes

Co-authored-by: Ashwini Khade <askhade@microsoft.com@orttrainingdev10.d32nl1ml4oruzj4qz3bqlggovf.px.internal.cloudapp.net>